Air-compressor.



No. 757,704. PATENTEDAPR. 19, 1904.

- J. c.- WILLIAMS.

AIR COMPRESSOR.

uruouzon rum) JULY 11, 1903.

no gonna. l 7 z sums-sum 1.

IIIIIII *JllllllllllllllllIIIIIII A5. f i 7 Maw LX977? Ziams w I ethanol I m: uanms pz'rzas co. PROMO. WASHKNGTON. u. c.

No. 757,704. I PATENTED APR. 19, 1904. J. o. WILLIAMS; AIR COMPRESSOR.

APPLICATION FILED JULY 11, 1903. N0 MODEL. 2 SHBETSBHBET 2.

awuiawfoz mam,

m: mums mas ca, PHDTOLHHQ', wAsmuGrox. a c.

JOHN CALDWELL WVILLIAMS,

Patented April 19, 1904.

PATENT} OFFICE.

or KANSAS crrr, MIssounI.

AIR-COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. 757,704, dated April 19, 1904.

Application filed July 1 1, 1903.

1'0 @156 whom, it may concern.-

Be it known that I, JOHN CALDWELL WIL- LIAMS, a citizen of the United States, residing at Kansas City, in the county of- Jackson and State of Missouri, have invented new and useful Improvements in Air-Compressors, of which the following is a specification.

My invention relates to newand useful im-. provements in air-compressors; and its object, is to provide a simple device of this character adapted to be operated manually and which utilizes weights which are so arranged and mounted as to be raised alternately and dropped automatically desired distances and upon pistons which are mounted within cylinders located within an air-receptacle.

With the above and other objects in view the invention consistsin the novel construction, combination, and arrangement of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in which Figure 1 is a side elevation of my improved air-compressor and showing the air-chamber in section. Fig. 2 is a plan view thereof, and Fig. 3 is an enlarged vertical section through the air-compressor.

Referring to the figures by numerals of reference, 1 is a receptacle for receiving compressed air, and projecting into this receptacle are cylinders 2, preferably formed in two groups and having outlets 3 at their lower ends, which are normally closed by means. of spring-pressed valves 4, whichare so arranged as to permit the discharge of air from the cylinders into the receptacle, but prevent the return thereof to the cylinders from the receptacle. In each cylinder is arranged a reciprocating piston 5, having a tubular rod 6, and the lower end of this rod is normally closed by a spring-pressed valve 7, which is mounted within the lower face of the piston and serves to prevent the return to'the rod of anyair which may be discharged therefrom. Inlets 8 are arranged within the rods at suitable points. The pistons of each group are connected by a frame 9, which is attached, by means of chains 10 or other flexible strips, to a weight 11,'which is slidably mounted on guide-rods Eerial No. 165,124, (No model.)

12, provided therefor. This weight has a hooked arm 13 at the center of its upper end, and this arm is adapted to be engaged by the hooked end of a bell-crank lever 14, pivoted to one end of an operating-lever 15. A spring 16 is interposed between this lever 15 and the upper end of the lever 14. As hereinbefore stated, a weight 11 is provided for each group of pistons, and therefore two levers 15 are employed, one for each weight. These levers are fulcrumed at the upper end of a standard 17 and atpoints adjacent the ends to which the bell-crank-levers are pivoted. Levers 15 are preferably of suflicient length to permit the weights 11 to be readily raised manually, andthe free ends of' these levers are connected by atable 18 or other flexible strip, which passes over a pulley 19, journaled in the upper end of a standard 20, The levers are so arranged as to move simultaneously in opposite directions, this movement being necessitated by reason of the flexible connection 18 between'the free ends thereof. Then one of the levers15 is pulled downward, the strip 18 will, as is obvious, draw the free end of the a other lever upward, thereby carrying its bellcrank lever 14 downward into engagement with the arm 13 of the lowered weight 11. This bell-crank lever will automatically engage the arm '13 and be held in engagement by the spring 16. After the free end of the lever 15 has been raised and the arm 13 has been engaged its movement is reversed, thereby causing the weight 11, engaged by its bellcrank lever 14:, to slide upward upon the guides 12. The chains 10 will be tensioned and draw the pistons 8, connected thereto, up ward, thereby creating a'vacuum in each cylinder 2 and resulting in the valve 7 opening automatically to admit air'from the rod 6 to the cylinders. When the weight reaches the upper ends of the guides 12, the bell-crank lever 14 willcontact with a stop 21. provided in the path thereof, and will be caused to swing upon its pivot and release the arm 13. The weight 11 will thus drop by gravity upon the frame 9 and will drive the piston connected therewith downward, thereby forcing the air from the cylinders :2 into the receptacle 1 provided therefor. Simultaneously with the release of the weight 11 the other weight is engaged by the bell-crank lever on the other operatinglever 15 preparatory to its being raised into the position shown in Fig. 3.

The levers 15 are of such length asto permit the weights 11 to be readily hoisted manually, and by providing a flexible connection between the frames 9 and the weights 11 the weight is permitted to drop with considerable velocity subsequent to its release upon the frame and drives the pistons 5 downward. It will of course be understood that the length of the levers 15 will be in proportion to the weight of the parts 11.

In the foregoing description I have shown the preferred form of my invention; but I do not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing the advantages thereof, and I therefore reserve the right to make such changes and alterations as may fairly come within the scope of my in- Vention.

Having thus described the invention, what is claimed as new is 1. In an air-compressor, the combination with a receptacle having a valved ,cylinder therein, a valved piston slidably mounted within the cylinder, and a tubular rod to the piston having an air inlet; of a lever fulcrumed adjacent the cylinder, a weight above the piston, a flexible connection between the weight and piston, and means for automatically engaging the lever with, and disengaging it from the weight.

2. In an air-compressor, the combination with a receptacle having a valved cylinder opening thereinto, a valved piston within the cylinder and a tubular rod to the piston having air-inlets; of guides, a weight mounted upon the guides and above the rod, a flexible connection between the weight and rod; a le Ver, a hooked bell-crank lever for engaging opening thereinto, a valved piston within the cylinder and a tubular rod extending from the piston and having an air-inlet; of guides, a weight mounted upon the guides and above the rod, a flexible connection between the weight and rod, a hooked arm to the weight, a spring-pressed hooked bell-crank lever pivoted to the operating-lever, and a stop in the path of the bell-crank lever.

5. In an air-compressor the combination with a receptacle, of cylinders projecting thereinto and having valved outlets, valved pistons within the cylinders, tubular rods extending from the pistons and having inlets, frames connecting the pistons to form groups, guides, a weight slidably mounted upon the guides and above each frame, a flexible connection between each weight and its frame, operating-levers, hooked arms to the weights, hooked bell-crank levers pivoted to the operating-levers, stops in the paths of the bellcrank levers, a pulley, and a flexible strip mounted thereon and connecting the free ends of the operating-levers.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN CALDWELL WILLIAMS.

Witnesses:

J. E. THRELKELD, SEAMAN RUssELL. 

